<!DOCTYPE html>
<html>

<head>
  <style>
    body {
      background-color: gray;
    }
  </style>
</head>

<body>
  <label>Classic File Picker</label>
  <button id="filePicker">Classic Picker</button>

  <label>FileSystem API Picker</label>
  <button id="fileSystemUploadButton">FileSystem Upload File</button>
  <button id="downloadButton">Download File</button>
</body>

</html>